java一位数组求平均值，小数

package com.c2;

//注意数据类型，float
public class Col {// 
	public static void main(String[] args) {
		float m[] = new float[4];
		float sum = 0;
		m[0] = 3;
		m[1] = 1;
		m[2] = 4;

		for (int i = 0; i < m.length; i++) {

			sum += m[i];
			// 求一维数组的平均值

		}
		System.out.println(sum / 3);
	}
}